Tube-mill.



W. B. EASTON.

TUBE MILL.

APPLICATION FILED JUNE 8, 1914.

1,139,651. Patented May18,1915.

Z SHEETS-SHEET I.

WZZIZ'ZQSSQS O 75 Zi7z/ /2Zor WMZ&.II&MAMZ4 Wzjlza 2151561652170.

1 WW 2/ J W. B. EASTON.

TUBE MILL.

APPLICAT'ON FILED JUNE 8. 19x4.

1, 139,65 1 Patented May 18, 1915.

2 SHEETS-SHEET 2.

7W5 ffrzucnzo WI/[M32 H, milz'alafiffizafon.

" :i EAS'ION, OF CHICAGO, ILLINOIS;

TUBE-MILL.

Specification of Letters ?atent.

Patented May 18, 1915.

Application filed June 8, 1914. Serial No. 843,782.

To all whom it may concern Be it known that 1, WILLIAM B. EASTON,

a citizen'of the United States, and a resident of Chicago, inthe county of Cook and State of Illinois, have invented a certain new and useful Improvement in Tube-Mills, of which the following is a specification.

This invention relates to machines for crushing ore and other materials, and relates particularly to the type of crushers known as tube mills.

As is well knownto persons familiar with the construction and operation of tube mills,

said mills consist of a suitable metal shell rotatably mounted by means of trunnions, through which the material to be treated, as the more or less finely comminuted ore from stamp mills or the like, is adapted to be fed by a current of water introduced into said tube'mill with the material to be treated therein. To provide for introducing ma: terial into said shell and discharging it therefrom, axial openings are formed through the supporting trunnion of said shell. As is also well known, the grinding,

crushing, or pulverizing of the ore is efiected by means of a mass of loose stones introduced into the shell of the tube mill so as to fill the same almost half full. Thus, as the shell of the tube mill rotates, said stones will be carried partly up the side of said shell in the direction of rotation, and falling back, will operate to crush ore particles caught between contacting surfaces of said stones. 7

One object of the invention is to increase the capacity of tube mills by providing means for delivering the treated ore or other material to the discharge opening of said mill after it has assed through said mill and has been sub ected to the grinding or pulverizing action thereof. 1

A further object of the invention is to provide means at the discharge end of the tube mill for regulating the time required for the ore'undergoing treatment to pass throu'ghthe crushing or pulverizing devices of said'mill proper, that is, the time durin which the ore passing through the mill wil be subjected to the action of the grinding devices, or in other words, to provide means for regulating the sizes of the particles of ore produced by the mill. I

To efiect the foregoing ends, a tube mill of my invention comprises the various features, combinations of features and details of construction hereinafter described and I claimed.

In the accompanying drawing, in which my lnvention is illustrated, Figure 1 is a central sectional view of the discharge end of a tube mill embodying my invention; Fig. 2 is an end view of that part of the machine shownin Fig. 1, the head of the shell being broken away to expose the perforated plate through which the treated material is carried by the current of water; Fig. 3 is an enlarged detail sectional view on the line 3-3 of Fig. 1; and Figs. 4 and 5 are enlarged detail sectional views taken on the line 44 of Fig. 1, respectively showing the vanes for raising and discharging the water from the tube mill fully open and fully closed. i

As my improvement relates only to the discharge end of the tube mill, and, as the general construction of such mills is generally well known to persons familiar with the art, I have, in the drawings, shown only the discharge end of the mill, and will limit my description thereto.

Referring now to the drawing, A designates the shell of the tube mill, A the head which closes the discharge end of said shell, formed on which is a trunnion A adapted to be mounted in a suitable fixed bearing not shown, in a familiar manner. The shell A is provided with a lining A of suitable refractory material, said lining being soconstructed and arranged that it may be readily removed and replaced when worn out, thus providing for extending the life of the tube mill indefinitely. Supported upon and at a distance from the head A is a perforated plate 1, the periphery of which extends into close proximity to the shell A. As shown, said plate 1 is supported by means of bolts 2 which extend through the plate 1 and head A, inserted over which are suitable spacing sleeves 3, which define the width of the space or chamber between said plate and head.

Located in the space between the plate 1 and head A are any desired number of vanes or buckets, designated as a whole 4,

constructed and arranged for raising water contained 1n said space or chamber together with the pulverized material carried thereby and discharging the same through the discharge opening from said tube mill as said tube mill revolves, in the manner presently described. To provide for regulating the discharge of the water and pulverized ore from said tube mill, said vanes or buckets 4 the space or chamber between said plate 1 and head A at one side thereof, as shown adjacent to the head A Said vanes or buckets also comprise movable sections 6,

,whichrest in contact with and are adapted to slide upon the fixed sections 5 of said vanes or buckets, so as to wholly or partially close the spaces or openings between the edges of said fixed sections andthe opposite side of said space or chamber, as shown, between the edges of the fixed sections of said vanes or buckets and the plate 1. As shown, the fixed sections 5 of said vanes or buckets 4 are secured in position by bolts which extend through sleeves or tubular bosses 7 formed on said fixed sections and which are secured in the plate 1 and head A Preferably, the securing bolts for said fixed sections are bolts 2 which connect the plate 1 to said head A the sleeves 7 also being spacing sleeves to form'the space or chamber between the plate 1 and head A in the same manner as the separate spacing sleeve 3. Themovable sections 6 of the vanes or buckets 4 are adapted to be operated by rods --8 secured therein, respectively, which are slidable in bearings formed in the head A and are provided with suitable handles 9 for conveniently operating the same. Leak-' age around the bolts 2 and rods 8 is pre- Vented by means of suitable packing, as rub: ber gaskets, washers or the like.

The movable sections 6 of the vanes or buckets 4 rest upon and cooperate with the front or advancing sides of the fixed sections 5 of said vanes or buckets and are supported and guided by said fixed sections and the adjusting rods-8. The contacting, guiding surfaces of said vane or bucket sections 5 and 6 are substantially parallel with planes passing through the axes of their respective adjusting rods 8, so that movement thereof will not tend to spring said rods and thuscause them to bind in their bearings. The front or advancing surfaces of the movable vane or bucket sections 6, however, declinetransvers'ely toward their free edges, as

adjacent to the plate 1. Thus, so long as there are spaces between the edges of said movable sections 6 and the plate 1, water carried up on the surfaces thereof, as they pass upward out of thewater contained in the tube mill, will at once run off therefrom. If, however, the movable sections 6 are adjusted so as to partially close the spaces between the outer edges of the fixed sections .5 and theopposite side of the space or chamber between the plate 1 and head A, grooves ,orchannels, and to discharge the same from the tube mill. And, when said movable sections 6 are adjusted to entirely 'close the space between the head A and'the plate 1,

practically all of the water raised by said vanes or buckets will be discharged from the tube mill, thus providing a maximum discharge.

The water raised by the vanes or buckets I 4 is adapted to be delivered into the discharge opening from the tube mill formed in thetrunnion A by means of a'hollow cone 11, the base of which rests against the plate 1 and the apex of which extends into the discharge opening in said trunnion A The surface of said cone '11 is concavely curved and formedthereon are ,webs -12 which extend across the space between said cone 11 and the inner curved surface of the head A where it merges into the discharge opening from the tube mill. Also, said webs 12 are substantially in the plan e of the vanes or buckets 4 and form inward continuatio ns thereofv so that water running inwardly along said vanes or buckets, as they raise, will run onto said webs 12 and along said webs to the discharge opening of the tube mill."

sition in the following manner :.Formed in As shown, the cone 11 is secured in pothe plate 1 is a central opening which is adapted to receive a reduced cylindrical projection 13 on the base of said cone, engagement of said projection 13 with the hole in said plate 1 operating to secure said cone against lateral displacement. At its oppo same manner as said plate. My invention, shown toward the edges thereof which are however, contemplates the use of any desired or approved means for preventing the stonescontained in said tube mill from pass-. ing out through the discharge opening.

I claim 1. In a tube mill, the, combination of a perforated plate secured in the shell of said tube mill and which forms a chamber at the discharge end thereof, a vane or vanes in said chamber comprising relatively'adjustable sections, adjusting means, and means for delivering water and material raised by said vanes into the discharge openingtfrgm said tube mill, substantially as descr1 e 2. In a tube mill, the combination of a perforated plate secured in the shell of said tube mill and which forms a chamber at the discharge end thereof, a vane or vanes in said chamber each comprising afixed section and an adjustable section, adjusting means face of which declines toward its free edge,

adjusting means therefor, and means for delivering water and material raised by said vanes into. the discharge opening from said tube mill, substantially as described.

4. In a tube mill, the combination of a perforated plate secured in the shell of said tube mill and which forms a-chamber at the discharge end thereof a vane or vanes in said chamber each comprising a ed section and a section which is adjustable transversely of said chamber, the adjustable sections being in front of the fixed sections and the front or advancing sides thereof declining toward their free edges, adjusting means therefor, and means for delivering water and material raised by said vanes into the dischargeopemng from said tube mill, substantially as described.

5. In a tube mill, the combination of a perforated plate secured in the shell of said tube mill and which forms a chamber 'at the discharge end thereof, a vane or vanes in said chamber each comprising ,a fixed section adjacent to the head-of the .tube mill, and a transversely adjustable section which rest upon the front or advancing side of said fixed section and the front or advancing side of which declines toward its free edge, adjusting means therefor, and means for delivering water and material raised by said vane or vanes into the discharge opening from said tube mill, substantially as described.

In testimony that I claim the foregoing as my invention, I aflix my signature in the presence of two subscribing witnesses this 23d day of May, 1914. c

. j w I: 1 i ti B. EASTON. ,witnessesz' s i D. Knit, Jn, A. H. Gnneoonn. 

